The warning from the house building industry came as the Government confirmed reforms to Part L of the Building Regulations will be delayed until April 2014, six months later than intended.
But builders and housing groups are warning that the changes will still hit smaller developers first, putting them at a disadvantage to major volume builders who can rely on building out pipelines of existing schemes with planning.
The new regulations will involve a fresh target for fabric energy efficiency and a 6% improvement on 2010 standards.
This is slightly lower than the 8% target originally considered and housebuilders will continue to have flexibility in how they approach carbon targets.
But a fabric energy efficiency target will be introduced to emphasise the importance of achieving a sound building fabric.
The update is intended as a step towards the Government’s ultimate goal of “zero carbon homes” by 2016.
Brian Berry, the chief executive of the Federation of Master Builders, warned the new standards will hit smaller developers harder and faster than the rest of the industry:
“FMB surveys of house-builders indicate the cost implications for smaller developments will be significantly above those estimated by the Government’s impact assessments.
“In a still fragile housing market, in which homebuyers are not prepared to pay the extra for energy efficiency, these extra costs will continue to come off the bottom line of builders, threatening the viability of many developments and further hindering hopes of a boost in housing supply.
“Smaller house-builders without large banks of prior planning consents will be hit first by these changes,” he warned.
Berry added: “We support the idea that ‘zero carbon’ should be the end destination, but the timetable for achieving it must be realistic and deliverable.
“The overwhelming feeling in the industry is that policy is running well ahead of the industry’s ability to deliver on these commitments.”
Mike Leonard, CEO of the Modern Masonry Alliance, added “We are disappointed that the government has failed to heed the advice of the Futures Group and the MMA, who both warned that a change to part L in the Building Regulations in the near future risks a failure to learn the lessons emerging from Part L 2010.
“Furthermore, it will impose a cost burden on SMEs, which will further damage their prospects of re-entering the housing market.
“The coalition government gave absolute commitment not to increase the regulatory burden on SMEs, so this goes down as another broken promise.”
